package com.cch.demo.sys.util;

import java.util.ArrayList;
import java.util.List;

public class TreeNodeBuilder {

    public static List<TreeNode> build (List<TreeNode> treeNodes , Integer topid){
        List<TreeNode> nodes = new ArrayList<>();
        for (TreeNode n1:treeNodes){
            if(n1.getPid() == topid){
                nodes.add(n1);
            }
            for (TreeNode n2:treeNodes){
                if(n2.getPid() == n1.getId()){
                    n1.getChildren().add(n2);
                }
            }
        }
        return nodes;
    }
}
